Steam-generator



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m0. WHEAT 82; A. CA'TCHPLR 'STEAM GENERATOR.

No. 267,625. Patented Nov. 14,v 1882.

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sTBAMeE-NBRATOR. A 110.267,625. Patented Nov. '14, 1882.

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UNrTi-n STATES 'y PATENT FFIc CORYDON VHEAT AND ALFRED CATCHPOLE, 0F GENEVA, NEW YORK.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 267,625, dated November 14, 1882.

Application filed May 15, 1882. (No model.)

tors, or more particularly to that class of water-circulators for heating dwellings and other buildings, and the object of this invention is to provide a machine for such purposes as will be practically automatic in operation, and thus dispense with attendance of an engineer or .other skilled labor, and to that end the invention consists in the construction of the same, as will be hereinafter more fully described, and particularly pointed out' in the claims.

In the accompanying drawings, similar letters of reference marked thereon indicate like parts of the-invention.

Figure l is an exterior view, in perspective, of our boiler; and Fig. 2, a vertical section thereof.

Ais the outer cylindrical shell or casing, and B the base-plate, in which is suitably secured the tire-grate C.

D is the top, provided with a dome, E, in which is suspended a reservoir or fuel-feeder, F, provided with a removable cover, G, `for supplying the coal or fuel.n Y'

To the outer shell, A, near the base, is connected the smoke-pipe H, extending upward parallel with the boiler, and from the dome E a pipe,.I, connects the interior of said dome with the smoke-pipe H.

J is an annular shell, concentric to the outer shell, A; and `K is the interior shell, inclosing a coil of pipe, L. Between the shells A and J the products of combustion pass off into the smoke-stack H, and between the inner shell, K, and the middle shell, J, is the water and steam space P. Between these shells J and K is a diaphragm, M, open at the top and i bottom, and extending completely around the shell K and about midway between it and the adjoining shell J. This diaphragm maybe provided with legs or suitably secured in place by stay-bolts or the like.

On the outside of the shell J is a series of vertical tubes, N, 'connected at the top and bottom to the interior water-space, between J and Kand the body vof the pipes themselves extend into the smoke-jacket between A and J. The water enters the feed-pipe O and passes into the water and steam space P and thence into the coil L through the opening l. A vertical gage-pipe, R, is attached to the feed-pipe O, and its top terminates in a draftregulator of ordinary construction. To thc upper part of the pipe R, near its top, is a short pipe, S, connecting it with the steamspace in the top of the boiler.

`R is the water-gage, attached to the vertical pipe R.

As the water enters the space P it comes into contactwith the heated shell K, which causes it `to rise or circulate up around and over the top of thediaphragm M, and theshell J, being cooler 'than K, because it isI farther removed from the lire, assists in keeping up this' circulation. By this means only the hottest water finds its way into the coil L, where the steam is generated and escapes into the steam-space in the top of the boiler proper. In addition to this circulation in thewaterspace, caused by the differential temperature .maintained or brought about by the diaphragm M, the set otl pipes or tubes N further facilitate this circulation by causing a downward current of water through them, as is more particularly the case when it is required to generate very rapidly and keep up the supply, while at ordinary or low temperatures for house-heating and the like the diaphragm alone will be found amply sufficient to keep Vup the proper circulation.

In starting the boiler the fire is made in the coil-chamber, and the direct draft passes up into the dome E and into the smoke-stack H, and after the re is well under way the damper t' is closed. This deects the draft and causes it to escape through the pipe T into the space between the shells A and J, and thence out through the smoke-stack H.

From the above description of our lboiler it will be seen that only a small quantity of water is used at a time, andour peculiar construction enables us to use the water to the best possible advantage.

IOO

Having thus fully described our invention, stack H, and direct-draft pipe I, provided with wlmi; we claim as new, and desire to secure-by damper z', substantially as sei; forth;

Letters Patent of the United States, is- In testimony whereofwe affix our signatures 1. In esteem-generator, the ooii L, the shells l inpresence oi' two Witnesses.'4 J lfind K and the diaphraonn M in combina- J 1 s tion with the circulating-Sims N, as and for the purpose set forth.

2. In e steam-generator, the Coil L, shells Witnesses: K, J, and A, diaphragm M, and return-tubes O. D. ALLEN, 1o N, in combination with the reservoir F, smoke- C. S. BURRALL. 

